热像法和能量法快速评估Q235钢的疲劳性能

借助热像法和能量法快速确定了单轴循环应力作用下Q235钢的疲劳性能参数,与传统实验结果相比,吻合较好。基于极限能理论假设,建立了Miner线性累积损伤理论的能量模型以预测构件的残余寿命。研究结果表明：热像法和能量法可以在较短的实验周期内快速地确定材料的疲劳极限和S-N曲线等疲劳性能参数;Miner理论的能量模型具有明确的物理意义,能准确预测循环载荷作用下构件的残余寿命。...

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Bibliographic Details
Published in材料工程 no. 12; pp. 71 - 76
Main Author 樊俊铃 郭杏林 吴承伟 邓德伟
Format Journal Article
LanguageChinese
Published 大连理工大学工业装备结构分析国家重点实验室,辽宁大连,116024%大连理工大学材料科学与工程学院,辽宁大连,116024 2012
Subjects
S-N曲线
残余寿命
热像法
疲劳
疲劳极限
能量法
热像法
疲劳极限
残余寿命
能量法
S-N曲线
疲劳
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ISSN1001-4381
1001-4381

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Summary:借助热像法和能量法快速确定了单轴循环应力作用下Q235钢的疲劳性能参数,与传统实验结果相比,吻合较好。基于极限能理论假设,建立了Miner线性累积损伤理论的能量模型以预测构件的残余寿命。研究结果表明：热像法和能量法可以在较短的实验周期内快速地确定材料的疲劳极限和S-N曲线等疲劳性能参数;Miner理论的能量模型具有明确的物理意义,能准确预测循环载荷作用下构件的残余寿命。
Bibliography:FAN Jun-ling1,GUO Xing-lin1,WU Cheng-wei1,DENG De-wei2（1 State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology,Dalian 116024,Liaoning,China; 2 School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China）
11-1800/TB
fatigue ; infrared thermography; energy approach ; fatigue limit ; S-N curve ; residual life
The infrared thermography was used to rapidly determine the fatigue parameters of Q235 steel undergoing uniaxial cyclic stress,and a good agreement was achieved between the predicted results and the results from the traditional fatigue testing methods.Based on the assumption of the limiting energy theory,the energy approach based on Miner＇s law was advanced to predict the residual fatigue life of samples.The results show that the infrared thermography and the energy approach can be used to rapidly determine the fatigue limit and the S-N curve in a short test period;and that the residual fatigue life can be accurately p
ISSN:1001-4381
1001-4381